First of sorry to hear about the news
First off, it sounds as if he is just going through a faze to find himself as an individual. Some people can do this in a relationship some can't. In this case he needed the time off to discover who he is and what he wants in life.
Right now he is still keeping his ties with you by bringing you to school so its not like he doesn't want you around. I would try talking with him to see if he can give you any idea to what the both of you future togather may be. If he is uncertain don't push him.
For right now let him guide his own journey to see what he wants. If you are the chosen path then don't be too worried he may be back in your life. If that doesn't happen then this will take time to get over but you'll find somebody to love down the road.